/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:57:16,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:57:16,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:57:16,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:57:16,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:57:16,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:57:16,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:57:16,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:57:16,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:57:16,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:57:16,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:57:16,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:57:16,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:57:16,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:57:16,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:57:16,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:57:16,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:57:16,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:57:16,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:57:16,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:57:16,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:57:16,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:57:16,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:57:16,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:57:16,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:57:16,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:57:16,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:57:16,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:57:16,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:57:16,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:57:16,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:57:16,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:57:16,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:57:16,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:57:16,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:57:16,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:57:16,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:57:16,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:57:16,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:57:16,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:57:16,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:57:16,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:57:16,596 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:57:16,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:57:16,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:57:16,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:57:16,600 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:57:16,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:57:16,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:57:16,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:57:16,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:57:16,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:57:16,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:57:16,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:57:16,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:57:16,602 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:57:16,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:57:16,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:57:16,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:57:16,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:57:16,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:57:16,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:57:16,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:57:16,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:57:16,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:57:16,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:57:16,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:57:16,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:57:16,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:57:16,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:57:16,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:57:16,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:57:16,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:57:16,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:57:16,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:57:16,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:57:16,934 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:57:16,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:57:16,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5dc14aa9/af7aad93069446bd88e1afc4e333a1bc/FLAGa10d11273 [2020-10-13 14:57:17,461 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:57:17,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:57:17,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5dc14aa9/af7aad93069446bd88e1afc4e333a1bc/FLAGa10d11273 [2020-10-13 14:57:17,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5dc14aa9/af7aad93069446bd88e1afc4e333a1bc [2020-10-13 14:57:17,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:57:17,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:57:17,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:57:17,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:57:17,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:57:17,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:57:17" (1/1) ... [2020-10-13 14:57:17,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac45c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:17, skipping insertion in model container [2020-10-13 14:57:17,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:57:17" (1/1) ... [2020-10-13 14:57:17,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:57:17,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:57:18,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:57:18,188 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:57:18,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:57:18,405 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:57:18,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18 WrapperNode [2020-10-13 14:57:18,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:57:18,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:57:18,407 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:57:18,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:57:18,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... [2020-10-13 14:57:18,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:57:18,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:57:18,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:57:18,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:57:18,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:57:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:57:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:57:18,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:57:18,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:57:18,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:57:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:57:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:57:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:57:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:57:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:57:18,542 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:57:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:57:19,341 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:57:19,341 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:57:19,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:57:19 BoogieIcfgContainer [2020-10-13 14:57:19,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:57:19,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:57:19,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:57:19,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:57:19,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:57:17" (1/3) ... [2020-10-13 14:57:19,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f97cea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:57:19, skipping insertion in model container [2020-10-13 14:57:19,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:57:18" (2/3) ... [2020-10-13 14:57:19,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f97cea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:57:19, skipping insertion in model container [2020-10-13 14:57:19,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:57:19" (3/3) ... [2020-10-13 14:57:19,356 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 14:57:19,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:57:19,376 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:57:19,392 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:57:19,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:57:19,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:57:19,422 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:57:19,422 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:57:19,422 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:57:19,423 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:57:19,423 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:57:19,423 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:57:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-13 14:57:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:57:19,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:19,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:19,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:19,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:19,470 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-13 14:57:19,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:19,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176736310] [2020-10-13 14:57:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:19,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:20,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:22,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:57:22,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:57:22,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2210 [2020-10-13 14:57:22,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:22,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:57:22,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:57:22,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:57:22,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:57:22,483 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:22,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:22,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:22,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:22,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:22,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:22,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:22,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:22,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:22,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:22,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176736310] [2020-10-13 14:57:22,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:22,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:57:22,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917127551] [2020-10-13 14:57:22,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:57:22,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:22,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:57:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:57:22,578 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-13 14:57:22,909 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:57:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:23,947 INFO L93 Difference]: Finished difference Result 712 states and 1188 transitions. [2020-10-13 14:57:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:57:23,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-13 14:57:23,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:23,969 INFO L225 Difference]: With dead ends: 712 [2020-10-13 14:57:23,969 INFO L226 Difference]: Without dead ends: 595 [2020-10-13 14:57:23,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:57:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-13 14:57:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 237. [2020-10-13 14:57:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 14:57:24,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 374 transitions. [2020-10-13 14:57:24,053 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 374 transitions. Word has length 66 [2020-10-13 14:57:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:24,053 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 374 transitions. [2020-10-13 14:57:24,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:57:24,054 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 374 transitions. [2020-10-13 14:57:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:57:24,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:24,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:24,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:57:24,058 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1268134624, now seen corresponding path program 1 times [2020-10-13 14:57:24,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:24,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053384516] [2020-10-13 14:57:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:24,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:24,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:26,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:26,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:57:26,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2494 [2020-10-13 14:57:26,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:57:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:57:26,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:57:26,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:26,863 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:26,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:26,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:26,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:26,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:26,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:26,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 14:57:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:26,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053384516] [2020-10-13 14:57:26,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:26,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:57:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857042742] [2020-10-13 14:57:26,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:57:26,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:26,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:57:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:57:26,915 INFO L87 Difference]: Start difference. First operand 237 states and 374 transitions. Second operand 7 states. [2020-10-13 14:57:27,135 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-13 14:57:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:28,489 INFO L93 Difference]: Finished difference Result 1483 states and 2442 transitions. [2020-10-13 14:57:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 14:57:28,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-13 14:57:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:28,499 INFO L225 Difference]: With dead ends: 1483 [2020-10-13 14:57:28,499 INFO L226 Difference]: Without dead ends: 1307 [2020-10-13 14:57:28,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:57:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-13 14:57:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 694. [2020-10-13 14:57:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-13 14:57:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1133 transitions. [2020-10-13 14:57:28,570 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1133 transitions. Word has length 67 [2020-10-13 14:57:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:28,570 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1133 transitions. [2020-10-13 14:57:28,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:57:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1133 transitions. [2020-10-13 14:57:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:57:28,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:28,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:28,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:57:28,575 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:28,575 INFO L82 PathProgramCache]: Analyzing trace with hash -714520107, now seen corresponding path program 1 times [2020-10-13 14:57:28,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:28,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109631335] [2020-10-13 14:57:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:28,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:29,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:31,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:31,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:57:31,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2524 [2020-10-13 14:57:31,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:57:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:31,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:31,344 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:31,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:31,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:31,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:31,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:31,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:57:31,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:31,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109631335] [2020-10-13 14:57:31,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:31,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:31,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349931662] [2020-10-13 14:57:31,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:31,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:31,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:31,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:31,381 INFO L87 Difference]: Start difference. First operand 694 states and 1133 transitions. Second operand 5 states. [2020-10-13 14:57:31,580 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:57:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:32,243 INFO L93 Difference]: Finished difference Result 2435 states and 4030 transitions. [2020-10-13 14:57:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:57:32,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-13 14:57:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:32,256 INFO L225 Difference]: With dead ends: 2435 [2020-10-13 14:57:32,257 INFO L226 Difference]: Without dead ends: 1858 [2020-10-13 14:57:32,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:57:32,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2020-10-13 14:57:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1272. [2020-10-13 14:57:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-13 14:57:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 2091 transitions. [2020-10-13 14:57:32,366 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 2091 transitions. Word has length 68 [2020-10-13 14:57:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:32,366 INFO L479 AbstractCegarLoop]: Abstraction has 1272 states and 2091 transitions. [2020-10-13 14:57:32,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 2091 transitions. [2020-10-13 14:57:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:57:32,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:32,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:32,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:57:32,374 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash -727781241, now seen corresponding path program 1 times [2020-10-13 14:57:32,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:32,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527025061] [2020-10-13 14:57:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:32,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:32,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:34,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:57:34,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:57:34,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2201 [2020-10-13 14:57:34,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:34,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:57:34,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 14:57:34,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:34,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:34,901 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:34,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:34,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:34,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:34,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:34,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:34,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:34,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:34,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:34,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:34,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:34,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527025061] [2020-10-13 14:57:34,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:34,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:57:34,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59228680] [2020-10-13 14:57:34,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:57:34,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:34,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:57:34,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:34,943 INFO L87 Difference]: Start difference. First operand 1272 states and 2091 transitions. Second operand 5 states. [2020-10-13 14:57:35,154 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:57:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:35,974 INFO L93 Difference]: Finished difference Result 4707 states and 7794 transitions. [2020-10-13 14:57:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:57:35,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 14:57:35,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:35,997 INFO L225 Difference]: With dead ends: 4707 [2020-10-13 14:57:35,997 INFO L226 Difference]: Without dead ends: 3562 [2020-10-13 14:57:36,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:57:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3562 states. [2020-10-13 14:57:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3562 to 2401. [2020-10-13 14:57:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2401 states. [2020-10-13 14:57:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3955 transitions. [2020-10-13 14:57:36,186 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3955 transitions. Word has length 69 [2020-10-13 14:57:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:36,187 INFO L479 AbstractCegarLoop]: Abstraction has 2401 states and 3955 transitions. [2020-10-13 14:57:36,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:57:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3955 transitions. [2020-10-13 14:57:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:57:36,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:36,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:36,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:57:36,189 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2053684873, now seen corresponding path program 1 times [2020-10-13 14:57:36,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:36,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370858848] [2020-10-13 14:57:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:36,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:36,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:37,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:41,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:57:41,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:57:41,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 14:57:41,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:41,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 14:57:41,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 14:57:41,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:57:41,486 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:41,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:41,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:41,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:41,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:41,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:41,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-13 14:57:41,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:41,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:41,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:41,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:41,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:57:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:41,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370858848] [2020-10-13 14:57:41,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:41,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:41,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989810978] [2020-10-13 14:57:41,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:41,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:41,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:41,544 INFO L87 Difference]: Start difference. First operand 2401 states and 3955 transitions. Second operand 4 states. [2020-10-13 14:57:41,742 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:57:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:42,961 INFO L93 Difference]: Finished difference Result 6388 states and 10546 transitions. [2020-10-13 14:57:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:42,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:57:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:42,990 INFO L225 Difference]: With dead ends: 6388 [2020-10-13 14:57:42,990 INFO L226 Difference]: Without dead ends: 4064 [2020-10-13 14:57:43,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:43,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2020-10-13 14:57:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 4062. [2020-10-13 14:57:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4062 states. [2020-10-13 14:57:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 6666 transitions. [2020-10-13 14:57:43,315 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 6666 transitions. Word has length 70 [2020-10-13 14:57:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:43,316 INFO L479 AbstractCegarLoop]: Abstraction has 4062 states and 6666 transitions. [2020-10-13 14:57:43,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 6666 transitions. [2020-10-13 14:57:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:57:43,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:43,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:43,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:57:43,319 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:43,319 INFO L82 PathProgramCache]: Analyzing trace with hash -990936345, now seen corresponding path program 1 times [2020-10-13 14:57:43,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:43,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782623756] [2020-10-13 14:57:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:43,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:43,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:43,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:43,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:44,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:44,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:48,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:57:48,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:57:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 14:57:48,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 14:57:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 14:57:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:48,553 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:48,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:48,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:48,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:48,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:48,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:48,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:48,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:48,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782623756] [2020-10-13 14:57:48,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:48,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:48,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904795320] [2020-10-13 14:57:48,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:48,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:48,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:48,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:48,587 INFO L87 Difference]: Start difference. First operand 4062 states and 6666 transitions. Second operand 4 states. [2020-10-13 14:57:48,795 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:57:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:50,282 INFO L93 Difference]: Finished difference Result 10751 states and 17644 transitions. [2020-10-13 14:57:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:50,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:57:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:50,330 INFO L225 Difference]: With dead ends: 10751 [2020-10-13 14:57:50,330 INFO L226 Difference]: Without dead ends: 6782 [2020-10-13 14:57:50,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6782 states. [2020-10-13 14:57:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6782 to 6780. [2020-10-13 14:57:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6780 states. [2020-10-13 14:57:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6780 states to 6780 states and 11050 transitions. [2020-10-13 14:57:50,916 INFO L78 Accepts]: Start accepts. Automaton has 6780 states and 11050 transitions. Word has length 70 [2020-10-13 14:57:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:50,916 INFO L479 AbstractCegarLoop]: Abstraction has 6780 states and 11050 transitions. [2020-10-13 14:57:50,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 6780 states and 11050 transitions. [2020-10-13 14:57:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 14:57:50,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:50,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:50,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:57:50,924 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:50,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:50,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1998371771, now seen corresponding path program 1 times [2020-10-13 14:57:50,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:50,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038214331] [2020-10-13 14:57:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:50,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:50,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:51,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:52,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:55,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:55,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 14:57:55,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:57:55,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 14:57:55,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:55,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 14:57:55,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 14:57:55,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:56,261 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:56,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:56,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:56,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:56,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:56,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:57:56,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:56,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:56,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:56,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:56,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038214331] [2020-10-13 14:57:56,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:56,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:56,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857277006] [2020-10-13 14:57:56,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:56,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:56,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:56,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:56,306 INFO L87 Difference]: Start difference. First operand 6780 states and 11050 transitions. Second operand 4 states. [2020-10-13 14:57:56,512 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:57:57,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:57,755 INFO L93 Difference]: Finished difference Result 17728 states and 28828 transitions. [2020-10-13 14:57:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:57:57,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-13 14:57:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:57,803 INFO L225 Difference]: With dead ends: 17728 [2020-10-13 14:57:57,803 INFO L226 Difference]: Without dead ends: 11043 [2020-10-13 14:57:57,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:57:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-10-13 14:57:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 11007. [2020-10-13 14:57:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11007 states. [2020-10-13 14:57:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11007 states to 11007 states and 17744 transitions. [2020-10-13 14:57:58,595 INFO L78 Accepts]: Start accepts. Automaton has 11007 states and 17744 transitions. Word has length 70 [2020-10-13 14:57:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:57:58,595 INFO L479 AbstractCegarLoop]: Abstraction has 11007 states and 17744 transitions. [2020-10-13 14:57:58,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:57:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11007 states and 17744 transitions. [2020-10-13 14:57:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:57:58,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:57:58,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:57:58,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:57:58,597 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:57:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:57:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash -807738537, now seen corresponding path program 1 times [2020-10-13 14:57:58,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:57:58,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285127793] [2020-10-13 14:57:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:57:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:58,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:58,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:59,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:57:59,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:57:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-13 14:57:59,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:57:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 14:57:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:57:59,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:57:59,483 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:57:59,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:57:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:57:59,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:57:59,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:57:59,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:57:59,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:57:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:57:59,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:57:59,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:57:59,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:57:59,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:57:59,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:57:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:57:59,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285127793] [2020-10-13 14:57:59,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:57:59,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:57:59,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613808232] [2020-10-13 14:57:59,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:57:59,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:57:59,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:57:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:59,525 INFO L87 Difference]: Start difference. First operand 11007 states and 17744 transitions. Second operand 4 states. [2020-10-13 14:57:59,792 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:58:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:01,016 INFO L93 Difference]: Finished difference Result 26189 states and 42132 transitions. [2020-10-13 14:58:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:01,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-13 14:58:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:01,051 INFO L225 Difference]: With dead ends: 26189 [2020-10-13 14:58:01,052 INFO L226 Difference]: Without dead ends: 15243 [2020-10-13 14:58:01,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:01,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2020-10-13 14:58:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 15241. [2020-10-13 14:58:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15241 states. [2020-10-13 14:58:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15241 states to 15241 states and 24194 transitions. [2020-10-13 14:58:01,803 INFO L78 Accepts]: Start accepts. Automaton has 15241 states and 24194 transitions. Word has length 71 [2020-10-13 14:58:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:01,804 INFO L479 AbstractCegarLoop]: Abstraction has 15241 states and 24194 transitions. [2020-10-13 14:58:01,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 15241 states and 24194 transitions. [2020-10-13 14:58:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:58:01,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:01,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:01,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:58:01,805 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash 903278326, now seen corresponding path program 1 times [2020-10-13 14:58:01,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:01,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440602856] [2020-10-13 14:58:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:01,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:01,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:03,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:04,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:04,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2986 [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:58:04,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:05,055 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:05,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:05,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:05,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:05,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:05,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:58:05,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:05,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:05,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:05,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:05,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440602856] [2020-10-13 14:58:05,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:05,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:05,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591967101] [2020-10-13 14:58:05,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:05,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:05,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:05,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:05,095 INFO L87 Difference]: Start difference. First operand 15241 states and 24194 transitions. Second operand 4 states. [2020-10-13 14:58:05,305 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:58:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:06,404 INFO L93 Difference]: Finished difference Result 34504 states and 54798 transitions. [2020-10-13 14:58:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:58:06,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:58:06,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:06,447 INFO L225 Difference]: With dead ends: 34504 [2020-10-13 14:58:06,448 INFO L226 Difference]: Without dead ends: 19326 [2020-10-13 14:58:06,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19326 states. [2020-10-13 14:58:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19326 to 19324. [2020-10-13 14:58:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19324 states. [2020-10-13 14:58:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 30600 transitions. [2020-10-13 14:58:07,446 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 30600 transitions. Word has length 73 [2020-10-13 14:58:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:07,446 INFO L479 AbstractCegarLoop]: Abstraction has 19324 states and 30600 transitions. [2020-10-13 14:58:07,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 30600 transitions. [2020-10-13 14:58:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 14:58:07,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:07,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:07,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:58:07,448 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash 268409429, now seen corresponding path program 1 times [2020-10-13 14:58:07,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:07,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119971419] [2020-10-13 14:58:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:07,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:07,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:12,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 14:58:12,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:12,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 14:58:12,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:58:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 14:58:12,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:58:12,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:12,751 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:12,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:12,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:12,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:12,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:12,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:12,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:58:12,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:12,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:12,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:12,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:12,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119971419] [2020-10-13 14:58:12,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:12,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:58:12,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526185525] [2020-10-13 14:58:12,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:58:12,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:58:12,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:12,801 INFO L87 Difference]: Start difference. First operand 19324 states and 30600 transitions. Second operand 6 states. [2020-10-13 14:58:13,064 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:58:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:15,211 INFO L93 Difference]: Finished difference Result 57966 states and 91888 transitions. [2020-10-13 14:58:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:58:15,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-13 14:58:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:15,312 INFO L225 Difference]: With dead ends: 57966 [2020-10-13 14:58:15,312 INFO L226 Difference]: Without dead ends: 38721 [2020-10-13 14:58:15,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:58:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38721 states. [2020-10-13 14:58:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38721 to 19324. [2020-10-13 14:58:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19324 states. [2020-10-13 14:58:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 30480 transitions. [2020-10-13 14:58:16,568 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 30480 transitions. Word has length 75 [2020-10-13 14:58:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:16,568 INFO L479 AbstractCegarLoop]: Abstraction has 19324 states and 30480 transitions. [2020-10-13 14:58:16,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:58:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 30480 transitions. [2020-10-13 14:58:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 14:58:16,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:16,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:16,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:58:16,570 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:16,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1201667880, now seen corresponding path program 1 times [2020-10-13 14:58:16,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:16,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600533075] [2020-10-13 14:58:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:16,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:16,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:16,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:16,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:18,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:21,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 14:58:21,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:21,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4954 [2020-10-13 14:58:21,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:58:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 14:58:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 14:58:21,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:21,784 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:21,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:21,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:21,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:21,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:21,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:21,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:21,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:21,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:21,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:21,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:21,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:21,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600533075] [2020-10-13 14:58:21,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:21,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:58:21,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129281002] [2020-10-13 14:58:21,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:58:21,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:58:21,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:21,820 INFO L87 Difference]: Start difference. First operand 19324 states and 30480 transitions. Second operand 6 states. [2020-10-13 14:58:22,056 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:58:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:26,142 INFO L93 Difference]: Finished difference Result 91324 states and 144562 transitions. [2020-10-13 14:58:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:58:26,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-10-13 14:58:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:26,265 INFO L225 Difference]: With dead ends: 91324 [2020-10-13 14:58:26,266 INFO L226 Difference]: Without dead ends: 72079 [2020-10-13 14:58:26,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:58:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72079 states. [2020-10-13 14:58:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72079 to 36078. [2020-10-13 14:58:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36078 states. [2020-10-13 14:58:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36078 states to 36078 states and 56620 transitions. [2020-10-13 14:58:28,484 INFO L78 Accepts]: Start accepts. Automaton has 36078 states and 56620 transitions. Word has length 78 [2020-10-13 14:58:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:28,484 INFO L479 AbstractCegarLoop]: Abstraction has 36078 states and 56620 transitions. [2020-10-13 14:58:28,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:58:28,485 INFO L276 IsEmpty]: Start isEmpty. Operand 36078 states and 56620 transitions. [2020-10-13 14:58:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:58:28,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:28,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:28,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:58:28,486 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1404910670, now seen corresponding path program 1 times [2020-10-13 14:58:28,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:28,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686783356] [2020-10-13 14:58:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:28,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:28,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:30,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:32,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:32,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:58:32,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:58:32,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4281 [2020-10-13 14:58:32,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:58:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 14:58:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:58:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:33,606 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:33,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:33,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:33,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:33,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:58:33,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:33,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:33,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686783356] [2020-10-13 14:58:33,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:33,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:58:33,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011977829] [2020-10-13 14:58:33,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:58:33,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:33,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:58:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:58:33,632 INFO L87 Difference]: Start difference. First operand 36078 states and 56620 transitions. Second operand 5 states. [2020-10-13 14:58:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:37,329 INFO L93 Difference]: Finished difference Result 63195 states and 98659 transitions. [2020-10-13 14:58:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:58:37,330 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 79 [2020-10-13 14:58:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:37,409 INFO L225 Difference]: With dead ends: 63195 [2020-10-13 14:58:37,410 INFO L226 Difference]: Without dead ends: 63193 [2020-10-13 14:58:37,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:58:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63193 states. [2020-10-13 14:58:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63193 to 36774. [2020-10-13 14:58:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36774 states. [2020-10-13 14:58:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36774 states to 36774 states and 57304 transitions. [2020-10-13 14:58:39,711 INFO L78 Accepts]: Start accepts. Automaton has 36774 states and 57304 transitions. Word has length 79 [2020-10-13 14:58:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:39,711 INFO L479 AbstractCegarLoop]: Abstraction has 36774 states and 57304 transitions. [2020-10-13 14:58:39,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:58:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 36774 states and 57304 transitions. [2020-10-13 14:58:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:58:39,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:39,714 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:39,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:58:39,715 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1075390058, now seen corresponding path program 1 times [2020-10-13 14:58:39,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:39,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717240448] [2020-10-13 14:58:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:39,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:44,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 14:58:44,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:44,967 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:44,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:44,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:44,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:44,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:44,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:44,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717240448] [2020-10-13 14:58:45,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:45,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:45,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025908841] [2020-10-13 14:58:45,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:45,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:45,001 INFO L87 Difference]: Start difference. First operand 36774 states and 57304 transitions. Second operand 4 states. [2020-10-13 14:58:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:47,297 INFO L93 Difference]: Finished difference Result 65807 states and 102659 transitions. [2020-10-13 14:58:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:47,297 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 14:58:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:47,338 INFO L225 Difference]: With dead ends: 65807 [2020-10-13 14:58:47,338 INFO L226 Difference]: Without dead ends: 29112 [2020-10-13 14:58:47,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29112 states. [2020-10-13 14:58:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29112 to 29034. [2020-10-13 14:58:49,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29034 states. [2020-10-13 14:58:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29034 states to 29034 states and 45035 transitions. [2020-10-13 14:58:49,972 INFO L78 Accepts]: Start accepts. Automaton has 29034 states and 45035 transitions. Word has length 101 [2020-10-13 14:58:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:49,972 INFO L479 AbstractCegarLoop]: Abstraction has 29034 states and 45035 transitions. [2020-10-13 14:58:49,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 29034 states and 45035 transitions. [2020-10-13 14:58:49,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:58:49,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:49,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:49,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:58:49,976 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1793966216, now seen corresponding path program 1 times [2020-10-13 14:58:49,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:49,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219259778] [2020-10-13 14:58:49,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:50,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:50,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:51,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:52,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:55,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:55,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:58:55,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:58:55,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 14:58:55,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:58:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:58:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 14:58:55,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:55,210 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:58:55,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:58:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:55,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:55,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:58:55,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:58:55,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:58:55,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:58:55,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:58:55,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:58:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:58:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:58:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:58:55,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:58:55,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219259778] [2020-10-13 14:58:55,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:58:55,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:58:55,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624720819] [2020-10-13 14:58:55,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:58:55,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:58:55,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:58:55,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:55,237 INFO L87 Difference]: Start difference. First operand 29034 states and 45035 transitions. Second operand 4 states. [2020-10-13 14:58:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:58:56,770 INFO L93 Difference]: Finished difference Result 43748 states and 67917 transitions. [2020-10-13 14:58:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:58:56,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2020-10-13 14:58:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:58:56,791 INFO L225 Difference]: With dead ends: 43748 [2020-10-13 14:58:56,791 INFO L226 Difference]: Without dead ends: 14794 [2020-10-13 14:58:56,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:58:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14794 states. [2020-10-13 14:58:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14794 to 14352. [2020-10-13 14:58:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14352 states. [2020-10-13 14:58:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14352 states to 14352 states and 22239 transitions. [2020-10-13 14:58:57,765 INFO L78 Accepts]: Start accepts. Automaton has 14352 states and 22239 transitions. Word has length 101 [2020-10-13 14:58:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:58:57,766 INFO L479 AbstractCegarLoop]: Abstraction has 14352 states and 22239 transitions. [2020-10-13 14:58:57,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:58:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 14352 states and 22239 transitions. [2020-10-13 14:58:57,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:58:57,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:58:57,768 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:58:57,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:58:57,769 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:58:57,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:58:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash -780411721, now seen corresponding path program 1 times [2020-10-13 14:58:57,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:58:57,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600506093] [2020-10-13 14:58:57,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:58:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:58:57,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:58:58,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:00,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:00,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:02,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:59:02,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:59:02,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:02,986 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:02,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:02,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:02,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:02,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:02,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:02,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:02,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:02,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:02,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 14:59:03,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600506093] [2020-10-13 14:59:03,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:03,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:03,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525066670] [2020-10-13 14:59:03,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:03,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:03,010 INFO L87 Difference]: Start difference. First operand 14352 states and 22239 transitions. Second operand 4 states. [2020-10-13 14:59:03,206 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 14:59:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:04,811 INFO L93 Difference]: Finished difference Result 32462 states and 50334 transitions. [2020-10-13 14:59:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:04,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-10-13 14:59:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:04,831 INFO L225 Difference]: With dead ends: 32462 [2020-10-13 14:59:04,831 INFO L226 Difference]: Without dead ends: 18190 [2020-10-13 14:59:04,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18190 states. [2020-10-13 14:59:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18190 to 18188. [2020-10-13 14:59:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18188 states. [2020-10-13 14:59:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18188 states to 18188 states and 28122 transitions. [2020-10-13 14:59:05,821 INFO L78 Accepts]: Start accepts. Automaton has 18188 states and 28122 transitions. Word has length 102 [2020-10-13 14:59:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:05,821 INFO L479 AbstractCegarLoop]: Abstraction has 18188 states and 28122 transitions. [2020-10-13 14:59:05,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 18188 states and 28122 transitions. [2020-10-13 14:59:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 14:59:05,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:05,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:05,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:59:05,823 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash -854832967, now seen corresponding path program 1 times [2020-10-13 14:59:05,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:05,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937113523] [2020-10-13 14:59:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:05,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:05,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:05,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:05,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:05,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:06,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:06,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:08,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:10,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 14:59:10,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:11,092 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:11,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:11,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:11,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:11,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:11,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:11,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:11,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:11,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:11,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:11,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:11,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:11,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 14:59:11,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937113523] [2020-10-13 14:59:11,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:11,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:11,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169876195] [2020-10-13 14:59:11,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:11,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:11,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:11,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:11,121 INFO L87 Difference]: Start difference. First operand 18188 states and 28122 transitions. Second operand 5 states. [2020-10-13 14:59:14,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:14,525 INFO L93 Difference]: Finished difference Result 53740 states and 82997 transitions. [2020-10-13 14:59:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:14,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-13 14:59:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:14,571 INFO L225 Difference]: With dead ends: 53740 [2020-10-13 14:59:14,571 INFO L226 Difference]: Without dead ends: 35581 [2020-10-13 14:59:14,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35581 states. [2020-10-13 14:59:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35581 to 35579. [2020-10-13 14:59:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35579 states. [2020-10-13 14:59:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35579 states to 35579 states and 54659 transitions. [2020-10-13 14:59:17,108 INFO L78 Accepts]: Start accepts. Automaton has 35579 states and 54659 transitions. Word has length 106 [2020-10-13 14:59:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:17,108 INFO L479 AbstractCegarLoop]: Abstraction has 35579 states and 54659 transitions. [2020-10-13 14:59:17,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 35579 states and 54659 transitions. [2020-10-13 14:59:17,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 14:59:17,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:17,111 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:17,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:59:17,111 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:17,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:17,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1915617473, now seen corresponding path program 1 times [2020-10-13 14:59:17,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:17,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623183526] [2020-10-13 14:59:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:17,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:17,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:21,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:21,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:59:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:59:22,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:59:22,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:22,331 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:22,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:22,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:22,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:22,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:22,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:59:22,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:22,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:22,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:59:22,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623183526] [2020-10-13 14:59:22,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:22,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:59:22,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913881851] [2020-10-13 14:59:22,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:59:22,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:22,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:59:22,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:22,362 INFO L87 Difference]: Start difference. First operand 35579 states and 54659 transitions. Second operand 4 states. [2020-10-13 14:59:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:28,132 INFO L93 Difference]: Finished difference Result 106691 states and 163905 transitions. [2020-10-13 14:59:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:59:28,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-10-13 14:59:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:28,224 INFO L225 Difference]: With dead ends: 106691 [2020-10-13 14:59:28,224 INFO L226 Difference]: Without dead ends: 71144 [2020-10-13 14:59:28,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:59:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71144 states. [2020-10-13 14:59:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71144 to 35581. [2020-10-13 14:59:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35581 states. [2020-10-13 14:59:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35581 states to 35581 states and 54661 transitions. [2020-10-13 14:59:31,230 INFO L78 Accepts]: Start accepts. Automaton has 35581 states and 54661 transitions. Word has length 107 [2020-10-13 14:59:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:31,230 INFO L479 AbstractCegarLoop]: Abstraction has 35581 states and 54661 transitions. [2020-10-13 14:59:31,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:59:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 35581 states and 54661 transitions. [2020-10-13 14:59:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:59:31,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:31,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:31,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:59:31,234 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:31,234 INFO L82 PathProgramCache]: Analyzing trace with hash -725902086, now seen corresponding path program 1 times [2020-10-13 14:59:31,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:31,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269531739] [2020-10-13 14:59:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:31,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:31,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:36,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:59:36,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 14:59:36,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:59:36,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:59:36,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:59:36,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:36,480 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:36,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:36,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:36,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:36,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:59:36,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269531739] [2020-10-13 14:59:36,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:36,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:36,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064515359] [2020-10-13 14:59:36,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:36,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:36,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:36,507 INFO L87 Difference]: Start difference. First operand 35581 states and 54661 transitions. Second operand 5 states. [2020-10-13 14:59:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:39,623 INFO L93 Difference]: Finished difference Result 71144 states and 109296 transitions. [2020-10-13 14:59:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:39,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 14:59:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:39,667 INFO L225 Difference]: With dead ends: 71144 [2020-10-13 14:59:39,667 INFO L226 Difference]: Without dead ends: 35581 [2020-10-13 14:59:39,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35581 states. [2020-10-13 14:59:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35581 to 35580. [2020-10-13 14:59:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35580 states. [2020-10-13 14:59:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35580 states to 35580 states and 54657 transitions. [2020-10-13 14:59:42,362 INFO L78 Accepts]: Start accepts. Automaton has 35580 states and 54657 transitions. Word has length 108 [2020-10-13 14:59:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:59:42,362 INFO L479 AbstractCegarLoop]: Abstraction has 35580 states and 54657 transitions. [2020-10-13 14:59:42,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:59:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 35580 states and 54657 transitions. [2020-10-13 14:59:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 14:59:42,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:59:42,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:59:42,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:59:42,366 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:59:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:59:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash 643682407, now seen corresponding path program 1 times [2020-10-13 14:59:42,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:59:42,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867288901] [2020-10-13 14:59:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:59:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:42,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:47,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:47,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 14:59:47,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:59:47,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:59:47,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:59:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:59:47,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:59:47,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:47,619 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:59:47,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:59:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:59:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:59:47,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:59:47,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:59:47,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:59:47,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:59:47,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:59:47,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:59:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:59:47,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:59:47,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:59:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 14:59:47,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867288901] [2020-10-13 14:59:47,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:59:47,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:59:47,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444723318] [2020-10-13 14:59:47,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:59:47,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:59:47,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:59:47,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:59:47,647 INFO L87 Difference]: Start difference. First operand 35580 states and 54657 transitions. Second operand 5 states. [2020-10-13 14:59:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:59:53,604 INFO L93 Difference]: Finished difference Result 104082 states and 159619 transitions. [2020-10-13 14:59:53,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:59:53,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 14:59:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:59:53,692 INFO L225 Difference]: With dead ends: 104082 [2020-10-13 14:59:53,692 INFO L226 Difference]: Without dead ends: 68541 [2020-10-13 14:59:53,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:59:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68541 states. [2020-10-13 15:00:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68541 to 68539. [2020-10-13 15:00:00,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68539 states. [2020-10-13 15:00:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68539 states to 68539 states and 104289 transitions. [2020-10-13 15:00:00,288 INFO L78 Accepts]: Start accepts. Automaton has 68539 states and 104289 transitions. Word has length 108 [2020-10-13 15:00:00,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:00,289 INFO L479 AbstractCegarLoop]: Abstraction has 68539 states and 104289 transitions. [2020-10-13 15:00:00,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 68539 states and 104289 transitions. [2020-10-13 15:00:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 15:00:00,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:00,294 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:00,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 15:00:00,294 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash -55079094, now seen corresponding path program 1 times [2020-10-13 15:00:00,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:00,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761096516] [2020-10-13 15:00:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:00,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:00,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:03,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:05,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:05,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 15:00:05,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 15:00:05,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 15:00:05,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:05,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:00:05,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 15:00:05,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 15:00:05,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:05,541 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:05,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:05,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:05,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:05,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:00:05,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761096516] [2020-10-13 15:00:05,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:05,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 15:00:05,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434193468] [2020-10-13 15:00:05,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 15:00:05,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:05,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 15:00:05,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:00:05,570 INFO L87 Difference]: Start difference. First operand 68539 states and 104289 transitions. Second operand 5 states. [2020-10-13 15:00:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:14,393 INFO L93 Difference]: Finished difference Result 170444 states and 258947 transitions. [2020-10-13 15:00:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:00:14,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-13 15:00:14,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:14,544 INFO L225 Difference]: With dead ends: 170444 [2020-10-13 15:00:14,545 INFO L226 Difference]: Without dead ends: 101938 [2020-10-13 15:00:14,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 15:00:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101938 states. [2020-10-13 15:00:24,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101938 to 101936. [2020-10-13 15:00:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101936 states. [2020-10-13 15:00:24,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101936 states to 101936 states and 153555 transitions. [2020-10-13 15:00:24,962 INFO L78 Accepts]: Start accepts. Automaton has 101936 states and 153555 transitions. Word has length 108 [2020-10-13 15:00:24,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:24,963 INFO L479 AbstractCegarLoop]: Abstraction has 101936 states and 153555 transitions. [2020-10-13 15:00:24,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 15:00:24,963 INFO L276 IsEmpty]: Start isEmpty. Operand 101936 states and 153555 transitions. [2020-10-13 15:00:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 15:00:24,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:24,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:24,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 15:00:24,969 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1933625183, now seen corresponding path program 1 times [2020-10-13 15:00:24,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:24,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314588645] [2020-10-13 15:00:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:25,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:25,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:26,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:27,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:27,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:29,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 15:00:29,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:30,192 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 15:00:30,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:00:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:30,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:00:30,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:00:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:00:30,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314588645] [2020-10-13 15:00:30,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:00:30,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:00:30,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139606780] [2020-10-13 15:00:30,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:00:30,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:00:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:00:30,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:30,216 INFO L87 Difference]: Start difference. First operand 101936 states and 153555 transitions. Second operand 4 states. [2020-10-13 15:00:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:00:43,426 INFO L93 Difference]: Finished difference Result 238928 states and 359951 transitions. [2020-10-13 15:00:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 15:00:43,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 109 [2020-10-13 15:00:43,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:00:43,622 INFO L225 Difference]: With dead ends: 238928 [2020-10-13 15:00:43,622 INFO L226 Difference]: Without dead ends: 137324 [2020-10-13 15:00:43,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:00:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137324 states. [2020-10-13 15:00:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137324 to 102716. [2020-10-13 15:00:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102716 states. [2020-10-13 15:00:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102716 states to 102716 states and 154587 transitions. [2020-10-13 15:00:55,629 INFO L78 Accepts]: Start accepts. Automaton has 102716 states and 154587 transitions. Word has length 109 [2020-10-13 15:00:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:00:55,629 INFO L479 AbstractCegarLoop]: Abstraction has 102716 states and 154587 transitions. [2020-10-13 15:00:55,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:00:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 102716 states and 154587 transitions. [2020-10-13 15:00:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 15:00:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:00:55,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:00:55,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 15:00:55,633 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:00:55,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:00:55,633 INFO L82 PathProgramCache]: Analyzing trace with hash -955678723, now seen corresponding path program 1 times [2020-10-13 15:00:55,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:00:55,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813800067] [2020-10-13 15:00:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:00:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:00:55,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:55,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:56,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:00:57,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking...